Alert archive / Idaho / Boise County
Weather alerts in Boise County, Idaho, 2022
73 weather alerts in 2022, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Boise County and its neighbors
Each county as a circle sized by its count in 2022. Tap one for its archive.
- Alerts
- 73
- Warnings
- 21
- Watches
- 19
- Advisories
- 19
- Busiest month
- September24 alerts
- Busiest day
- August 12, 202214 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Boise County, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 6 | 1 | 83% | 1 | 100% | 14 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Boise, ID: tornado warnings | 0 | 1 | 0% | |||
| NWS Boise, ID: severe thunderstorm warnings | 61 | 15 | 75% | 40 | 63% | 23 min |
An office's figures cover every county it serves, including across state lines.
Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.
The alerts
Every alert, in the order issued. Times are local, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 1, 2:17 AM MST | Winter Storm Watch | BOI | 37 hr |
| Jan 2, 2:56 PM MST | Winter Weather Advisory | BOI | 20 hr |
| Jan 2, 2:56 PM MST | Winter Weather Advisory | BOI | 68 hr |
| Jan 3, 11:22 AM MST | Winter Storm Warning | BOI | 42 hr |
| Jan 5, 2:20 PM MST | Winter Weather Advisory | BOI | 47 hr |
| Jan 13, 12:37 PM MST | Air Stagnation Advisory | BOI | 7 days |
| Apr 3, 8:18 PM MDT | Winter Weather Advisory | BOI | 34 hr |
| Apr 4, 5:37 PM MDT | Dust Storm Advisory | BOI | 83 min |
| Apr 10, 3:12 AM MDT | Winter Weather Advisory | BOI | 63 hr |
| May 2, 2:41 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 5, 12:57 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 10, 2:24 PM MDT | Flood Watch | BOI | 58 hr |
| Jul 21, 1:02 PM MDT | Red Flag Warning | PIH | 32 hr |
| Jul 21, 2:15 PM MDT | Red Flag Warning | BOI | 31 hr |
| Jul 26, 12:52 PM MDT | Fire Weather Watch | PIH | 24 hr |
| Jul 27, 12:49 PM MDT | Red Flag Warning | PIH | 32 hr |
| Jul 28, 1:06 PM MDT | Fire Weather Watch | PIH | 15 hr |
| Jul 28, 2:11 PM MDT | Heat Advisory | BOI | 4 days |
| Jul 29, 3:38 AM MDT | Red Flag Warning | PIH | 18 hr |
| Aug 11, 2:23 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 11, 11:41 PM MDT | Special Weather Statement | BOI | 34 min |
| Aug 12, 1:15 AM MDT | Special Weather Statement | BOI | 45 min |
| Aug 12, 1:55 AM MDT | Special Weather Statement | BOI | 35 min |
| Aug 12, 1:13 PM MDT | Mesoscale Discussion | SPC | 92 min |
| Aug 12, 1:55 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 12, 2:56 PM MDT | Special Weather Statement | BOI | 34 min |
| Aug 12, 3:11 PM MDT | Severe Thunderstorm Warning | BOI | 23 min |
| Aug 12, 3:46 PM MDT | Severe Thunderstorm Warning | BOI | 29 min |
| Aug 12, 3:48 PM MDT | Severe Thunderstorm Warning | BOI | 27 min |
| Aug 12, 4:07 PM MDT | Special Weather Statement | BOI | 23 min |
| Aug 12, 4:13 PM MDT | Severe Thunderstorm Warning | BOI | 30 min |
| Aug 12, 4:41 PM MDT | Mesoscale Discussion | SPC | 94 min |
| Aug 12, 4:54 PM MDT | Special Weather Statement | BOI | 36 min |
| Aug 12, 5:32 PM MDT | Severe Thunderstorm Warning | BOI | 43 min |
| Sep 1, 1:14 PM MDT | Fire Weather Watch | PIH | 24 hr |
| Sep 1, 2:22 PM MDT | Fire Weather Watch | BOI | 23 hr |
| Sep 2, 1:16 PM MDT | Red Flag Warning | BOI | 32 hr |
| Sep 2, 1:18 PM MDT | Fire Weather Watch | PIH | 23 hr |
| Sep 2, 1:18 PM MDT | Red Flag Warning | PIH | 32 hr |
| Sep 3, 11:54 AM MDT | Red Flag Warning | PIH | 33 hr |
| Sep 4, 3:14 AM MDT | Heat Advisory | BOI | 4 days |
| Sep 5, 2:53 PM MDT | Fire Weather Watch | BOI | 23 hr |
| Sep 6, 10:32 AM MDT | Red Flag Warning | BOI | 8 hr |
| Sep 6, 2:01 PM MDT | Red Flag Warning | PIH | 31 hr |
| Sep 6, 2:21 PM MDT | Fire Weather Watch | BOI | 24 hr |
| Sep 6, 2:21 PM MDT | Red Flag Warning | BOI | 31 hr |
| Sep 7, 12:44 PM MDT | Red Flag Warning | PIH | 32 hr |
| Sep 7, 2:36 PM MDT | Red Flag Warning | BOI | 30 hr |
| Sep 7, 5:56 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 7, 6:41 PM MDT | Severe Thunderstorm Warning | BOI | 64 min |
| Sep 7, 7:09 PM MDT | Dust Storm Advisory | BOI | 36 min |
| Sep 7, 7:45 PM MDT | Special Weather Statement | BOI | 45 min |
| Sep 7, 7:46 PM MDT | Dust Storm Advisory | BOI | 59 min |
| Sep 9, 1:53 PM MDT | Fire Weather Watch | BOI | 25 hr |
| Sep 9, 2:46 PM MDT | Fire Weather Watch | PIH | 24 hr |
| Sep 17, 6:34 PM MDT | Areal Flood Advisory | BOI | 3 hr |
| Sep 21, 12:40 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Sep 21, 8:03 PM MDT | Special Weather Statement | BOI | 27 min |
| Oct 21, 2:15 PM MDT | Winter Weather Advisory | BOI | 28 hr |
| Nov 2, 1:45 PM MDT | Winter Storm Watch | BOI | 25 hr |
| Nov 8, 2:42 AM MST | Winter Weather Advisory | BOI | 38 hr |
| Nov 14, 10:42 AM MST | Air Stagnation Advisory | BOI | 12 days |
| Nov 26, 1:14 PM MST | Winter Storm Watch | BOI | 14 hr |
| Nov 27, 3:10 AM MST | Winter Weather Advisory | BOI | 34 hr |
| Nov 28, 1:46 PM MST | Winter Storm Watch | BOI | 24 hr |
| Nov 29, 1:23 PM MST | Winter Storm Warning | BOI | 64 hr |
| Dec 7, 2:01 PM MST | Winter Weather Advisory | BOI | 46 hr |
| Dec 8, 1:03 PM MST | Winter Storm Watch | BOI | 23 hr |
| Dec 9, 11:55 AM MST | Winter Storm Warning | BOI | 47 hr |
| Dec 20, 2:39 AM MST | Winter Storm Watch | BOI | 11 hr |
| Dec 20, 1:41 PM MST | Winter Weather Advisory | BOI | 20 hr |
| Dec 25, 1:55 PM MST | Winter Storm Watch | BOI | 14 hr |
| Dec 29, 3:02 AM MST | Winter Weather Advisory | BOI | 33 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 6 |
| Severe Thunderstorm Watch | 2 |
| Mesoscale Discussion | 6 |
| Special Weather Statement | 8 |
| Flooding | |
| Flood Watch | 1 |
| Areal Flood Advisory | 1 |
| Winter | |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 7 |
| Winter Weather Advisory | 11 |
| Heat | |
| Heat Advisory | 2 |
| Wind and dust | |
| Dust Storm Advisory | 3 |
| Fire | |
| Red Flag Warning | 12 |
| Fire Weather Watch | 9 |
| Fog and smoke | |
| Air Stagnation Advisory | 2 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20212023
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.